Hoisting mechanism



HOISTING MECHANISM Filed Dec. 22, 1933 2 Sheets-Sheet 2 Patented Apr. 30, 1935 PATENT OFFICE HOISTING MECHANISM Robert C. Osgood,

of Massachusetts Claremont, N. H., assignor to Sullivan Machinery Company,

a corporation Application December 22, '1933, Serial No. '103,585

15 Claims.

This invention relates to hoisting mechanisms, and more 'particularly to improvements in the drum drive and controle-means of a hoisting mechanism of the plural drum type.

An object of this invention is to provide an improved hoisting'mechanism. Another object is to provide an improved hoisting mechanism of the plural drum type having improved drum control means. A further object is to provide animproved control means for the drum driving means and the drum braking means of such a hoisting mechanism. Yet anotherobject is to lprovide im proved operator-controllable power devices controlling the drum driving and braking means of a hoist of the plural drum type. These and other objects will, however,

pear.

In the accompanying drawings there is shown for purposes of illustration one form which the invention may assume in practice.

In these drawings,-

Fig. l is a plan view of a hoisting mechanism of the plural drum type having embodied therein the illustrative form of the improved control means.

Fig. 2 is a side elevational view of the hoist'- ing mechanism shown in Fig. v1.

Fig. 3 is an end elevational view of the hoisting mechanism.

Fig. 4 is a central longitudinally extending vertical sectional View taken substantially on line 4 4 of Fig. 1.

vFig. 5 is a detail sectional View showing one of the power cylinders. d

Fig. 6 is a perspective view proved control means. -1

Fig. 7 is a. detail sectional view taken substantially on line 1--1 of Fig. 6.

Fig. 8 is a detail sectional View showing the 'iiuid control valve.

In this illustrative embodiment of the invention the improved control means generally designated I is shown lembodied in a hoisting mechanism generallyr designated 2 which is herein preferably of the same general type as that disclosed in my Patent No. 1,740,707, granted Dec. 24, 1929, although it will be evident that the improved control means may be associated with hoists of various other types.

The hoisting mechanism disclosed herein comprises a base frame 3 having upstanding end supports 4 and 5. Secured to one end of the base frame 3 is a supplemental base frame 6- which forms a support for a motor 1. Secured to the power shaft 8 of this motor, as shown in Fig. 4,

showing the imrespectively.

. it will be noted that when band 24 is a motor pinion 9 meshing with an internal gear I0 keyed to one end of a longitudinally extending horizontal driving or transmission shaft suitably journaled within bearings supported within the upstanding end supports 4 and 5. Keyed adjacent to the opposite ends of the shaft II are spur drive pinions I2 and I3 which constantly mesh respectively with planetary drum driver gears I4 and I5, each of whichis journaled on a stub shaft I8 carried by the cable winding drums I1 and I8,

These drums are rotatably mounted on the drive shaft II and are herein arranged in substantially end abutting relation between the upstan'ding supports 4 and 5. The gears I4 and I5 constantly mesh respectively with internal gears I9 and 20 suitably secured to reaction or clutch control members 2I and 22, respectively, these reaction members each being provided with a hub portion journaled within the bearings likewise carried within the upstanding supports 4, 5. Each of the gear portions secured to the reaction members 2| and 22 is externally grooved as at 23 and suitable brake bands 24 and 25, respectively cooperate with the bottoms of these grooves. In this instance, 'formed on the adjacent ends of the drums are anged portions having external grooves 26 with which suitable spin contro brake bands 21 and 28 respectively cooperate. Suitable mechanism for controlling each brake band is provided which the operator may tighten selectively to hold either of the reaction members 2|, 22 stationary or loosen to permit free rotation of the latter and for applying the brake bands 21, 28 for braking drum rotation when the reaction member control brakes are released, as hereinafter described.

In the operation of this hoisting mechanism, the motor is running, the transmission shaft Il, and consequently the drive pinions I2 and I3, are rotated, though the winding drums I1 and I8 loosely journaled on this shaft may be idle if the brake bands 24 and 25 controlling the reaction members 2l and 22 are released so that the reaction members may freely rotate. If it is desired to rotate the drum I1 to wind in its cooperating cable, the brake controlling rotation of the reaction member 2l is applied, consequently preventing rotation of the internal gear I9. The pinion I2 then causes the planetary gear I4 to roll around. the internal gear I9 as a trackway and move with it the winding drum I1. The winding drum I8 is-free to pay out its cooperating cable under thecontrol of the brake band 28, the brake band 25 controlling the reaction member 22 being released at this time, and the reaction member 22 being freely rotatable. If it is desired to rotate the drum I8 to wind in its cooperating cable and to pay out the cable cooperating with the drum I1, the brake band controlling the reaction member 2| is released, permitting rotation of the drum I1 under the control of the brake band 21. The brake band 25 controlling rotation of the reaction member 22 is then applied and the internal gear 28 held stationary, the pinion I3 then causing the planetary gear I5 to roll around the internal gear 20 as a trackway and causing the drum I8 to revolve therewith. It will therefore be evident that through'suitable application of the brake bands 24 and 25, the Winding drums I1 and I8 may be selectively positively driven from the motor 1; and that when these brake bands are released, the winding drums may remain idle during running of the motor. In the present instance, the brake bands 21, 28 control undesirable spinning of the drums when the brake bands controlling the reaction members 2! and 22 are released and merely constitute drag frictions.

Now referring to the improved drum control means, it will be noted that arranged at the end of the base adjacent the upstanding support 5 is a pair of power cylinders 30 and 3| each pivotally mounted at its rear end at 32 on a bracket 33 attached to the adjacent end of the support 3. Each of these cylinders has reciprocably mounted therein a piston 34, each having a forwardly projecting piston rod 35 projecting through a stulng box 36 carried by the front head 31 of the cylinder. Arranged between the front cylinder head and the piston 34 and encircling the piston rodis a coil spring 38 for returning the piston 34 to its rearmost position when the cylinder at the rear side of the piston is vented to atmosphere. The forward or outer end of each cylinder at the front side of the piston is vented to atmosphere through a port 39. The outer ends of the piston, rods 35, 35 are pivotally connected at 40 to levers 4I and 42, respectively. 'Ihe lever 4I is fixed to a tubular shaft 43 journaled in bearing brackets 44 secured to the support 3, while the lever 42 is fixed to a shaft journaled within the tubular shaft 43 and a bearing bracket 46 similar to the brackets 44 and likewise secured to the support 3. Fixed to the tubular shaft 43 between the right hand bearing supports 44, 44 is a lever 41 pivotally connected at 48 to a rod 49 in turn pivotally connected at its upper end at 50 to a lever 5I. 'I'his lever is pivotally connected at 52 to one end of the brake band 25 and at 53 to a toggle link 54 in turn pivotally connected at 55 to the opposite end of the brake band. Fixed to the end of the inner shaft 45 remote from the lever 42 is a lever 56 pivotally connected at 51 toa rod 58 in turn connected through lever mechanism similar to that above described to the brake band 24. The brake bands 21 and 28 which control spinning of the drums are provided with similar lever operating mechanism and the brake band 21 is operated from the inner shaft 45 by a lever 59 xed to the shaft, and pivotally connected at 68 to a rod 6I, while the brake band 28 is operated from the tubular shaft 43 by a lever 62 xed to the shaft and pivotally connected at 63 to a rod 64. The levers 41, 56, 59 and 62 are arranged on their respective shafts so that when one shaft is rotated the brakeband for one drum is released While the other is applied, while when the other shaft is rotated, one brake band for one drum is applied while the other is released. In other words, when the drive control brake band 24 for the drum I1 is applied, the spin control brake band 21 for that drum is released, while when the spin control brake band 28 for the drum I8 is applied, the drive control brake band 25 for that drum is released.

The means for supplying uid to the power cylinders 38, 3I and for controlling such fluid supply herein4 comprises a valve casing 65 carried by a plate 66 secured to the upstanding support 5, and this valve casing has arranged therein a usual four-way valve having an operating lever 61. Connected to the opposite sides of the valve casing 65 are ilexible pipe connections 68 and 69 leading to the rear ends of the power cylinders 30 and 3|, respectively. Connected to the bottom of the valve casing is a fluid supply pipe 10, this fluid supply pipe communicating with the interior of the valve casing through a restricted opening. Arranged at the top of the valve casing is a free exhaust pipe 1I.

When the handle 61 of the four-way valve is in the full line position shownin Fig. 3, pressure fluid is supplied through the pipe connection 68 to the rear end of the power cylinder 30, thereby moving the piston 34 outwardly to swing the lever 4I thereby to rotate the tubular shaft 43 in a direction to release the brake band 28 and apply the brake band 25, and as a result the reaction member 22 is held stationary to effect drive of the drum I8. The piston 34 of the power cylinder 3| is at that time held in its released position by the coil spring 38, and as a result, the lever 42 is held in such a position as to maintain the drive control brake band 24 released while the spin control brake band 21 is applied, and as a result maintaining the drum I1 disconnected from its drive with the spinning brake applied with sucient pressure to prevent undesirable spinning of the drum. When the handle 61 of the four-way valve is swung into the dotted line position shown in Fig. 3, pressure fluid is supplied through the pipe connection 69 to the power cylinder 3 I,.thereby moving the piston forwardly to effect actuation through the links and levers of the brake bands 24 and 21 so that the brake band 24 is applied and the brake band 21 is released. At the same time the power cylinder 30 is vented to atmosphere, and the piston thereof is moved into its released position by the coil spring 38 thereby to apply the spin control brake band 28 and to release the drive control brake band 25, and as a result the drum I8 is disconnected from its drive while the spinning brake 28 is applied. It will thus be seen that one or the other of the drums is always connected to its drive while the other drum is disconnected from its drive with its spinning brake applied under the manual control of a common operating element. It will also be noted that the parts are so arranged that the drums are disconnected from their -drive before the spinning brakes are applied, the drum drive control brake being first released and upon release of the same the spinning brake is applied.

Although there is shown but single acting power cylinders for the brake control means, it will be evident that if desired the springs may be omitted and the pistons actuated by pressure fluid in both directions, and under certain conditions but a single double acting power cylinder may be employed for controlling through suitable linkage the brakes of both drums. It has been found, however, under the conditions to which the hoistcontrol means for said power ing mechanism disclosed herein is particularly adapted, the springs 38 act to apply the spinning brakes and release the drum drive control brakes in a more desirable manner.

While there is in this application specically described one form which the invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be embodied in various other' forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

l. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving' means, drive control means for connecting said drums to said driving means, drum braking means, power devices for controlling said drive control means and said braking means comprising a pair of motori., one motor controlling the control and braking means for one drum and the other -motor controlling the control and braking means for the other drum, and common control means for said power devices.

2. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving means, drive control means for connecting said drums to 'said drive means, drum braking means, power devices for controlling said drive control means and said braking means comprising a pair of motors, one motor controlling the control and braking means for one drum and the other motor controlling the control and braking means for the other drum, whereby when one drum is connected to its drive the other drum is braked, and common control means for said power devices.

3. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving means, drive control means for connecting Asaid drums to said driving means, drum braking means, power devices including a pair of motors, one individual.

to the control and braking means for each drum, and means actuated by said motors for controlling said drive control means and said braking means, and common control means for said motors.

4. In a hoisting mechanism, relatively rotata- ,ble cable winding drums, drum driving means,

drive control means for connecting said drums to said driving means, drum braking means, power devices for controlling said drive control means and said braking means comprising a pair of power cylinders having pistons reciprocable therein, one power cylinder controlling the control and braking means for one drum and the other power cylinder controlling the control and braking means for the other drum, and common devices.

5. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving means, drive control means for connecting said drums to said driving means, drum braking means, power devices for controlling said drive control means and said braking means comprising a pair of power cylinders having pressure uid actuated pistons reciprocable therein, one power cylinder controlling the control and braking means for one drum and the other power cylinder controlling the control and braking means for the other drum, and common control means for said power devices comprising a common control valve for regulating the flow of pressure fluid to said power cylinders.

6. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving means, drive control means for connecting said drums to said driving means. drum braking means, power devices controlling said drive control means and said braking means comprising power cylinders, one individual to the control and braking means for each drum, a piston reciprocable in each cylinder, said pistons being movedA in one direction in said cylinders by pressure fluid, and springs acting on said pistons for moving the latter in the opposite direction.

'7. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving means, drive control means for connecting said drums to said driving means, drum braking means, power devices controlling said drive control means and said braking means comprising power cylinders, one individual to the control and braking means for each drum, a piston reciprocable in each cylinder, said pistons being moved in one direction in said cylinders by pressure iluid, and springs acting on said pistons for moving the latter in the opposite direction, said pistons being moved in the first mentioned direction by pressure fluid tol actuate said drive control means and said pistons being moved in the opposite direction by said springs to actuate said drum braking means.

8. Ina hoisting mechanism, a cable winding drum, drum driving means, drive control means for connecting said drum to said driving means, drum braking means, a power cylinder, a piston reciprocable therein operatively connected with said drive control and braking means, means for supplying pressure iiuid to said power cylinder to move said piston in one idirection to actuate said drive control means to connect said Vdrum to its drive, and a spring acting on said piston for moving the latter in the opposite direction to release said drive control means and to apply said braking means.

9. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving means, drive control means for connecting said drums to said driving means, power devices for controlling said drive control means comprising a pair of motors, one motor controlling the drive control means for one drum and the other the drive control means for the other drum, and common control means for said motors whereby when the drive control means for one drum is connected the other is always released.

10. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving and control means, drum braking means, power devices for controlling said drum braking means comprising a pair of motors, one controlling the braking means for one drum and the other controlling the braking means for the other drum, and common control means for said motors whereby when one braking means is applied the other is always released.

1l. In a hoisting mechanism, a cable winding drum, drum driving means, drive control means for connecting said drum to sai-d driving means, drum braking means, and motor operated devices for applying said braking means and connecting said control means whereby when said control means 1s connected the braking means is always released and vice versa, said motor operated devices including a power cylinder, a piston reciprocable therein, means for supplying 12. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving means, drive control means for connecting said drums to said driving means, power operated means for controlling said drum drive control means comprislng a pair of separate power devices, one power device controlling the drive control means for one drum and the other 'the drive control means for the other drum, and separate transmission means between said power devices respectively and said drive control means for said drums, and common control means for said power devices controllingr supply of operating medium thereto whereby when the drive control means of one drum is connected the other is always released.

13. In a hoisting mechanism, relatively rotatable cable winding drums, drum driving and control means, drum braking means, separate power operated means for controlling said drum braking means comprising a pair of separate power devices, one controlling the braking means for one drum and the other controlling the braking means for the other drum, and separate transmission means between said power devices, respectively, and said drum braking means, and common control means for said power devices whereby when one braking means is applied the.

other is always released.

14. In a hoisting mechanism, relatively rotatable winding drums, drum driving means, drive control means for connecting said drums to said driving means, drum braking means, power operated means for controlling said drive control means and said braking means comprising a pair of separate power devices, one power device controlling the drive control means and braking means for one drum and the other the drive control means and braking means for the other drum, each power device effecting alternatively connection of the drive control and application of the braking means for its respective drum, separate transmission means between said power devices, respectively, and said drive control and braking means for said drums, and common control means for said power devices whereby when the drive control for one drum is connected and the braking means therefor is released the drive control means for the other drum is always released and the braking means for the latter drum is always applied.

15. In a hoisting mechanism, a cable winding drum, drum driving means, drive control means for connecting said drum to said driving means, drum braking means, and motor operated devices for applying said braking means and connecting said control means whereby when said control means is connected the braking means is always released and vice versa, -said motor operated devices including a pressure uid actuated power device, means for supplying pressure fluid to said power device to move the power element thereof in one direction, and a spring acting on said movable power element for moving said power element in the opposite direction when the pressure uid in said power device is vented to atmosphere.

ROBERT C. OSGOOD. 

